[U-Boot] Booting Linux kernel on x86_64

[Bin Meng]

Hi Ryan,

On Tue, Aug 13, 2019 at 8:23 AM Bin Meng <bmeng.cn at gmail.com> wrote:
>
> Hi Ryan,
>
> On Tue, Aug 13, 2019 at 12:48 AM Ryan Wilkins
> <ryan at elevated-networks.com> wrote:
> >
> >
> >
> > > On Aug 10, 2019, at 8:42 AM, Andy Shevchenko <andy.shevchenko at gmail.com> wrote:
> > >
> > > You may try to enable 'earlyprintk=efi' (newer kernels have different
> > > approach, i.e. 'earlycon=efifb') and also add 'keep_bootcon' to see if
> > > the problem is at the beginning or ending stages of boot process.
> > >
> > >
> > >
> > > --
> > > With Best Regards,
> > > Andy Shevchenko
> >
> >
> > Andy,
> >
> > This worked for me and I was able to see that the kernel was booting but was unable to mount the rootfs.  It also told me that my framebuffer isn’t being initialized properly so I wasn’t seeing screen output.
> >
>
> I was able to boot U-Boot as an EFI payload on QEMU, then boot a Linux
> 4.17 kernel from the payload. The kernel correctly detects the
> framebuffer and was able to draw a penguin.

Did you enable CONFIG_FB_VESA in the kernel?

Regards,
Bin